The concept of space worm holes, rather than its existence was first postulated by Einstein that tells us about the possibilities of traveling through space that would be virtually impossible in the complete life-span of a human being. In short, it is a hypothetical feature that allows ‘time travel’ through it.
Features of worm holes
The existence of worm holes have been explained by the famous theory called ‘The Theory of Relativity’ by Einstein, who said that massive celestial bodies can change both space and time. The physical shape and size of worm holes is still in the realm of unknown. The concept of wormhole can easily be understood by imaging two mouths with a common throat. In fact, the name worm hole is coined from the analogy that a worm by burrowing a hole through an apple along its tapered end on both sides, would reach much quicker than the time it would take by covering the much longer distance through the circumference.
Similarly, the worm holes connect different locations of the universe and through them matter can pass through much faster than the speed of light.
The space worm holes not only connect different regions within a single galaxy, they also connect different parallel galaxies. Such types of inter-universe wormholes are called Schwarzschild worm holes.
Time travel
The theory of relativity says that the distance and time is dependant upon the motion. So, if an astronaut in a spacecraft moves faster than the speed of light into the space and returns after, say a year, by that time a considerable time ( may be some centuries) might have elapsed by then. So, when you cover distance at a considerably less time, you would go beyond the effect of aging. In other words, by time travel or by moving to space at far greater speed than light would, you wouldn’t get old. Although it may sound unbelievable, ‘The Theory of Relativity’, as postulated by Einstein, clearly explains this.
The path through which matters move inside a worm hole are called ‘closed time curve’ as time is thought to be closed, while traveling inside them. Such worm holes are known as ‘time holes.’
The theory of quantum gravity also has a role in ‘time travel.’ It takes into account the dispersion of radiations through the worm holes and researches are going on about its possible effects and impact on ‘time travel.’